Feature/embeddable iframe

[frostyfan109]

This PR adds functionality for embedding TranQL as an iframe in other applications through a query string parameter. It also replaces the old Robokop answer viewer with the newer Gamma Viewer.

Embedding

• Embedded mode can be toggled with the following query string ?embed={FULL|SIMPLE|GRAPH|true|false|""}.
  • The query string value is case insensitive, and each value corresponds to a specific EmbedMode enum value:
    • full -> FULL -> Includes more of the App's functionality such as the codemirror (with autocompletion) and the answer viewer.
    • simple, graph, true, "" (just ?embed) -> SIMPLE -> Includes just the graph and answer viewer.
    • false, no query arg ->NONE -> The full app; embedded mode is not enabled.
  • A typical embedded URL may look like https://heal.renci.org/tranql?embed=FULL&q=SELECT%20phenotypic_feature-%3Edisease%0A%20%20FROM%20%22%2Fschema%22%0A%20WHERE%20phenotypic_feature%3D%22HP%3A0012378%22
• The codemirror query will automatically execute on a 1000ms debounce in the full embed mode, since there is no "Run" button.
• Graph zooming and panning is disabled in the embedded version. This is because the graph takes up 100vh and 100vw, so if a user scrolls down, there is no way to get back up to the codemirror (since the graph intercepts the scroll wheel for zooming).
  • Technically, this could be re-enabled in the SIMPLE embed mode, since the graph is the entire page in the first place. However, it has been left disabled for now for consistency.
• localStorage and caching functionality has all been disabled when in embedded mode. Since the primary purpose is for cross-domain iframes, it does not make sense that the App would read or write from the normal sites memory, nor would it likely be able to in most browsers/environments (would throw lots of errors).

Gamma Viewer

• Replaces Robokop answer viewer tool with Gamma Viewer widget.
• Adds the Gamma Viewer to the embedded mode as well.

Bugs

This also fixes a bug with the query string argument ?query which automatically executes a query on page load. Something was going wrong with the way the App loaded and the param would result in an empty graph being returned even if the query would normally yield results.